diff options
Diffstat (limited to 'drivers/net/ethernet/mellanox/mlx5/core/port.c')
-rw-r--r-- | drivers/net/ethernet/mellanox/mlx5/core/port.c | 44 |
1 files changed, 34 insertions, 10 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/port.c b/drivers/net/ethernet/mellanox/mlx5/core/port.c index 21b7f05b16a5..cc262b30aed5 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/port.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/port.c @@ -293,15 +293,36 @@ static int mlx5_query_module_num(struct mlx5_core_dev *dev, int *module_num) return 0; } +static int mlx5_eeprom_page(int offset) +{ + if (offset < MLX5_EEPROM_PAGE_LENGTH) + /* Addresses between 0-255 - page 00 */ + return 0; + + /* Addresses between 256 - 639 belongs to pages 01, 02 and 03 + * For example, offset = 400 belongs to page 02: + * 1 + ((400 - 256)/128) = 2 + */ + return 1 + ((offset - MLX5_EEPROM_PAGE_LENGTH) / + MLX5_EEPROM_HIGH_PAGE_LENGTH); +} + +static int mlx5_eeprom_high_page_offset(int page_num) +{ + if (!page_num) /* Page 0 always start from low page */ + return 0; + + /* High page */ + return page_num * MLX5_EEPROM_HIGH_PAGE_LENGTH; +} + int mlx5_query_module_eeprom(struct mlx5_core_dev *dev, u16 offset, u16 size, u8 *data) { + int module_num, page_num, status, err; u32 out[MLX5_ST_SZ_DW(mcia_reg)]; u32 in[MLX5_ST_SZ_DW(mcia_reg)]; - int module_num; u16 i2c_addr; - int status; - int err; void *ptr = MLX5_ADDR_OF(mcia_reg, out, dword_0); err = mlx5_query_module_num(dev, &module_num); @@ -311,21 +332,24 @@ int mlx5_query_module_eeprom(struct mlx5_core_dev *dev, memset(in, 0, sizeof(in)); size = min_t(int, size, MLX5_EEPROM_MAX_BYTES); - if (offset < MLX5_EEPROM_PAGE_LENGTH && - offset + size > MLX5_EEPROM_PAGE_LENGTH) + /* Get the page number related to the given offset */ + page_num = mlx5_eeprom_page(offset); + + /* Set the right offset according to the page number, + * For page_num > 0, relative offset is always >= 128 (high page). + */ + offset -= mlx5_eeprom_high_page_offset(page_num); + + if (offset + size > MLX5_EEPROM_PAGE_LENGTH) /* Cross pages read, read until offset 256 in low page */ size -= offset + size - MLX5_EEPROM_PAGE_LENGTH; i2c_addr = MLX5_I2C_ADDR_LOW; - if (offset >= MLX5_EEPROM_PAGE_LENGTH) { - i2c_addr = MLX5_I2C_ADDR_HIGH; - offset -= MLX5_EEPROM_PAGE_LENGTH; - } MLX5_SET(mcia_reg, in, l, 0); MLX5_SET(mcia_reg, in, module, module_num); MLX5_SET(mcia_reg, in, i2c_device_address, i2c_addr); - MLX5_SET(mcia_reg, in, page_number, 0); + MLX5_SET(mcia_reg, in, page_number, page_num); MLX5_SET(mcia_reg, in, device_address, offset); MLX5_SET(mcia_reg, in, size, size); |